{"id":904,"date":"2023-04-30T20:17:36","date_gmt":"2023-04-30T18:17:36","guid":{"rendered":"http:\/\/www.cosmoespai.com\/cat\/?p=904"},"modified":"2023-04-30T20:17:36","modified_gmt":"2023-04-30T18:17:36","slug":"les-petjades-del-astronautes-encara-estan-a-la-lluna","status":"publish","type":"post","link":"https:\/\/www.cosmoespai.com\/cat\/les-petjades-del-astronautes-encara-estan-a-la-lluna\/","title":{"rendered":"Les petjades del astronautes encara estan a la Lluna"},"content":{"rendered":"\n<p class=\"has-text-align-justify\">El 1969 va ser l\u2019any en que l\u2019home va arribar per primer cop a la Lluna. Neil Armstrong va ser la primera persona de la hist\u00f2ria en posar un peu sobre la superf\u00edcie del nostre sat\u00e8l\u00b7lit natural, fet que va representar una aut\u00e8ntica fita en la hist\u00f2ria de la humanitat.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">La superf\u00edcie lunar est\u00e0 feta d\u2019una capa anomenada regolita, formada per una barreja de pols, petites roques i altres elements, acumulats durant milers de milions d\u2019anys. Aix\u00f2 fa que les petjades dels astronautes a la Lluna quedin marcades i visibles. Com veurem en aquest article, aquestes petjades encara no han desaparegut, i segurament continuaran existint durant molt temps.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><em><u><strong>Per qu\u00e8 no s\u2019esborren?<\/strong><\/u><\/em><\/h4>\n\n\n\n<p class=\"has-text-align-justify\">A la Terra \u00e9s molt com\u00fa que hi hagi vent, pluja, tempestes, inundacions o un reciclatge del mantell terrestre. Tots aquests fen\u00f2mens provoquen l\u2019erosi\u00f3 de roques i muntanyes, canviant al llarg del temps els paisatges de la Terra.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">No obstant, <strong><a href=\"http:\/\/www.cosmoespai.com\/cat\/hi-ha-atmosfera-a-la-lluna\/\" target=\"_blank\" rel=\"noreferrer noopener\">la Lluna no t\u00e9 atmosfera<\/a><\/strong>, pel que tots aquests fen\u00f2mens meteorol\u00f2gics no hi tenen lloc. Per tant, les petjades dels astronautes no han pogut ser esborrades en tot aquest temps.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><em><u><strong>Desapareixeran en algun moment?<\/strong><\/u><\/em><\/h4>\n\n\n\n<p class=\"has-text-align-justify\">Tot i que la Lluna no est\u00e0 sotmesa a les mateixes condicions clim\u00e0tiques que la Terra, la manca d\u2019atmosfera l\u2019exposa a altres perills, com ara l\u2019impacte de meteorits, o el vent solar.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">El constant impacte de meteorits al nostre sat\u00e8l\u00b7lit natural fa que s\u2019envoli la regolita de la superf\u00edcie. Al llarg del temps, aix\u00f2 podria cobrir les petjades dels astronautes a la Lluna, tot i que aquest proc\u00e9s tardaria molt de temps.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">D\u2019altra banda, el vent solar \u00e9s un continu corrent de part\u00edcules molt energ\u00e8tiques que provenen del Sol. A la Terra estem protegits d\u2019ell gr\u00e0cies al camp magn\u00e8tic, per\u00f2 la Lluna no t\u00e9 cap manera de desviar-lo. Tot i que els efectes a curt termini del vent solar sobre el nostre sat\u00e8l\u00b7lit no s\u00f3n apreciables, al llarg de milions d\u2019anys podrien arribar a fer desapar\u00e8ixer les petjades dels astronautes.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p><strong>Entrades Similars:<\/strong><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/hi-ha-atmosfera-a-la-lluna\/\">Hi ha atmosfera a la Lluna?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/per-que-la-lluna-sallunya-de-la-terra\/\">Per qu\u00e8 la Lluna s\u2019allunya de la Terra?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/perque-la-lluna-nomes-ens-ensenya-una-cara\/\">Perqu\u00e8 la Lluna nom\u00e9s ens ensenya una cara?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/la-historia-de-lapollo-13-lexit-despres-del-fracas\/\">La hist\u00f2ria de l\u2019Apollo 13, l\u2019\u00e8xit despr\u00e9s del frac\u00e0s<\/a><\/p>\n\n\n\n<p><strong>Entrades Populars:<\/strong><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/perque-la-lluna-nomes-ens-ensenya-una-cara\/\">Perqu\u00e8 la Lluna nom\u00e9s ens ensenya una cara?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/stephenson-2-18-lestrella-mes-gran-coneguda-a-lunivers\/\">Stephenson 2-18, l\u2019estrella m\u00e9s gran coneguda a l\u2019univers<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/lexplotacio-minera-al-cinturo-dasteroides-una-font-de-recursos\/\">L\u2019explotaci\u00f3 minera al cintur\u00f3 d\u2019asteroides, una font de recursos<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/la-brossa-espacial-un-gran-problema\/\">La brossa espacial, un gran problema<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/com-es-van-extingir-els-dinosaures\/\">Com es van extingir els dinosaures?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/que-passaria-si-la-terra-deixes-de-rotar\/\">Qu\u00e8 passaria si la Terra deix\u00e9s de rotar?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/la-missio-a-venus-de-la-sonda-venus-express-per-la-esa\/\">La missi\u00f3 a Venus de la sonda Venus Express per la ESA<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/quins-son-els-requisits-per-a-ser-un-planeta\/\">Quins s\u00f3n els requisits per a ser un planeta?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/perque-no-es-poden-sentir-sons-a-lespai\/\">Perqu\u00e8 no es poden sentir sons a l\u2019espai?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/quina-mida-i-forma-tindrien-els-extraterrestres\/\">Quina mida i forma tindrien els extraterrestres?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/les-unitats-de-mesura-que-fem-servir-en-astronomia\/\">Les unitats de mesura que fem servir en astronomia<\/a><\/p>\n\n\n\n<p><strong>Entrades Recents:<\/strong><\/p>\n\n\n<ul class=\"wp-block-latest-posts__list is-grid columns-3 wp-block-latest-posts\"><li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/com-viatjar-al-futur-sense-violar-les-lleis-de-la-fisica\/\">Com Viatjar al Futur Sense Violar les Lleis de la F\u00edsica<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/que-es-la-gravetat\/\">Qu\u00e8 \u00e9s la gravetat?<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/per-que-hi-ha-mes-materia-que-antimateria-a-lunivers\/\">Per qu\u00e8 hi ha m\u00e9s mat\u00e8ria que antimat\u00e8ria a l\u2019univers?<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/que-es-lantimateria\/\">Qu\u00e8 \u00e9s l\u2019antimat\u00e8ria?<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/per-que-els-centres-de-les-galaxies-contenen-forats-negres\/\">Per qu\u00e8 els centres de les gal\u00e0xies contenen forats negres?<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>El 1969 va ser l\u2019any en que l\u2019home va arribar per primer cop a la Lluna. Neil Armstrong va ser la primera persona de la<span class=\"read-more-link\"><a class=\"read-more\" href=\"https:\/\/www.cosmoespai.com\/cat\/les-petjades-del-astronautes-encara-estan-a-la-lluna\/\">Continuar llegint<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":905,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":""},"categories":[69],"tags":[108,454,734,73,735,649],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2023\/04\/Petjades_Astronautes.jpg?fit=720%2C405","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":150,"url":"https:\/\/www.cosmoespai.com\/cat\/la-cara-fosca-de-la-lluna-que-es-el-que-shi-amaga\/","url_meta":{"origin":904,"position":0},"title":"La cara fosca de la Lluna. Qu\u00e8 \u00e9s el que s\u2019hi amaga?","author":"Ferran","date":"26 d'agost de 2020","format":false,"excerpt":"La Lluna, per bonica que sigui, sempre ens ensenya la mateixa cara. Si observes la Lluna durant un temps, t\u2019acabes fixant en que sempre veiem la mateixa cara, el paisatge no canvia. La cara que no es veu des de la Terra s\u2019anomena la cara fosca de la Lluna, tot\u2026","rel":"","context":"A &quot;Lluna&quot;","block_context":{"text":"Lluna","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/lluna\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/08\/Cara_Fosca_Lluna.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/08\/Cara_Fosca_Lluna.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/08\/Cara_Fosca_Lluna.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/08\/Cara_Fosca_Lluna.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":273,"url":"https:\/\/www.cosmoespai.com\/cat\/la-historia-de-lapollo-13-lexit-despres-del-fracas\/","url_meta":{"origin":904,"position":1},"title":"La hist\u00f2ria de l\u2019Apollo 13, l\u2019\u00e8xit despr\u00e9s del frac\u00e0s","author":"Ferran","date":"6 de mar\u00e7 de 2021","format":false,"excerpt":"Si els \u00e8xits dels allunatges de l\u2019Apollo 11 i de l\u2019Apollo 12 van donar la impressi\u00f3 de que les missions a la Lluna eren f\u00e0cils, l\u2019Apollo 13, llen\u00e7ada el 11 d\u2019abril de 1970, va posar en relleu els perills que comportaven aquests viatges. L\u2019objectiu de la missi\u00f3 Aquest hagu\u00e9s hagut\u2026","rel":"","context":"A &quot;Astronautes&quot;","block_context":{"text":"Astronautes","link":"https:\/\/www.cosmoespai.com\/cat\/category\/astronautes\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/03\/Apollo_13.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/03\/Apollo_13.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/03\/Apollo_13.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/03\/Apollo_13.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":637,"url":"https:\/\/www.cosmoespai.com\/cat\/quina-edat-te-la-terra\/","url_meta":{"origin":904,"position":2},"title":"Quina edat t\u00e9 la Terra?","author":"Ferran","date":"29 de maig de 2022","format":false,"excerpt":"En comparaci\u00f3 a la vida humana, la Terra t\u00e9 una edat incre\u00efblement m\u00e9s gran. Al llarg de la hist\u00f2ria, i amb desenvolupaments tecnol\u00f2gics que permeten mesures cada cop m\u00e9s precises, s\u2019ha pogut establir l\u2019edat de la Terra amb molta precisi\u00f3. Les dificultats associades Tot i que en un primer moment,\u2026","rel":"","context":"A &quot;La Terra&quot;","block_context":{"text":"La Terra","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/la-terra\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/05\/Edat_Terra.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/05\/Edat_Terra.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/05\/Edat_Terra.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/05\/Edat_Terra.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":444,"url":"https:\/\/www.cosmoespai.com\/cat\/el-falcon-heavy-el-coet-mes-potent-actualment\/","url_meta":{"origin":904,"position":3},"title":"El Falcon Heavy, el coet m\u00e9s potent actualment","author":"Ferran","date":"10 de setembre de 2021","format":false,"excerpt":"SpaceX, fundada per Elon Musk al 2002, ha tingut un nombre significatiu d\u2019\u00e8xits, i ja planeja una missi\u00f3 tripulada a Mart. El coet que SpaceX ha posat m\u00e9s recentment en funcionament \u00e9s el Falcon Heavy. En l\u2019actualitat, aquest \u00e9s el coet m\u00e9s potent que existeix. El Saturn V, que va\u2026","rel":"","context":"A &quot;Coets&quot;","block_context":{"text":"Coets","link":"https:\/\/www.cosmoespai.com\/cat\/category\/coets\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/09\/Falcon_Heavy.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/09\/Falcon_Heavy.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/09\/Falcon_Heavy.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/09\/Falcon_Heavy.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":98,"url":"https:\/\/www.cosmoespai.com\/cat\/com-es-va-formar-la-lluna\/","url_meta":{"origin":904,"position":4},"title":"Com es va formar la Lluna?","author":"Ferran","date":"23 de juny de 2020","format":false,"excerpt":"La Lluna, el sat\u00e8l\u00b7lit natural de la Terra, no es va formar al mateix temps que la Terra, sin\u00f3 que ho va fer uns milions d\u2019anys despr\u00e9s de que es form\u00e9s la Terra. Una de les teories sobre la formaci\u00f3 de la Lluna, i la m\u00e9s acceptada, \u00e9s la \u00abteoria\u2026","rel":"","context":"A &quot;Lluna&quot;","block_context":{"text":"Lluna","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/lluna\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/06\/Formaci\u00f3_Lluna.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/06\/Formaci\u00f3_Lluna.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/06\/Formaci\u00f3_Lluna.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2020\/06\/Formaci\u00f3_Lluna.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":303,"url":"https:\/\/www.cosmoespai.com\/cat\/per-que-la-lluna-sallunya-de-la-terra\/","url_meta":{"origin":904,"position":5},"title":"Per qu\u00e8 la Lluna s\u2019allunya de la Terra?","author":"Ferran","date":"3 de maig de 2021","format":false,"excerpt":"Fa milions d\u2019anys, la Lluna estava 18 vegades m\u00e9s a prop de la Terra del que ho est\u00e0 en els nostres dies, i la seva mida aparent al cel era molt m\u00e9s gran de la que observem actualment. Avui en dia sabem que la Lluna s\u2019allunya de nosaltres a una\u2026","rel":"","context":"A &quot;Lluna&quot;","block_context":{"text":"Lluna","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/lluna\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Allunyament_Lluna.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Allunyament_Lluna.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Allunyament_Lluna.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Allunyament_Lluna.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/904"}],"collection":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/comments?post=904"}],"version-history":[{"count":1,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/904\/revisions"}],"predecessor-version":[{"id":906,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/904\/revisions\/906"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media\/905"}],"wp:attachment":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media?parent=904"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/categories?post=904"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/tags?post=904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}